Sand-blast apparatus.



C. E. BILLINGS.'

SAND BLAST APPARAUS. AAPPLICATION FILED mm1, 1915.

Patented Feb. 6, 1917.

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C. E. BILLINGS.

SAND wBLAST APPARATUS. APPLlcATloN FILED Fss.4,1915.

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SAND-BLAST APPARATUS.

Specification of Letters Patent.

Patented Feb. 6, 1917.

Application filed February 4, 1915. Serial No. 6,194.

To all 'whom it may concern:

Be it known that I, CLARENCE E. BIL- Lixos, citizen of the UnitedStates, residing at N ew Haven, in the county ot New Haven and State ofConnecticut, have invented certain new and useful Improvements in.

l more particularly to the self-contained type wherein the operativeelements are confined in a rotective housing.

It as ,for an object to provide an improved means for directing the sandblast upon the articles being treated.

A further object of this invention is provision of an improved form ofspray head with the sand hopper carried thereby.

A further-object of this invention is provision of a union in the airline between a stationary and moving part in which one partv forms thebearing about which the other artA rotates and the further provision ofa riving meansfor the rotating part.

Af further object of this invention is a provisioxof a sandlhopper incombination with a blast in which said hopper automatically controls thesupply of sand thereto as it passes a delivering chute.

Further objects will be apparent from the following specification,appended claims and drawings thereof, in which7 Figure 1 is a frontelevation of the device constructed in accordance with this invention,Fig. 2 is a. side elevation thereof, Fig. 3 is a erspective view showingparts in section ci) the conveying mechanism and its associated parts,Fig. l is a sectional view through. tbe'delivering chute showing .oneform ofvalve mechanism, Fig. 5 is a.

vertical sectional View through the spray head and sand hop er, Fig. 6iS a sectional view through the Joint supporting the revolving sprayheads, Fig. 7 is aplan view of a small portion of the table whichsupportstfhe articles being treated, F ig. is a vertical sectional viewthrough a modilied iiorm'of spray head with an adjustable hopper carriedthereby, and Fig. 9 is a horif" zontal sectional view as on the line 9-9of Fig. 2. l

In-lmachines of this character, it is customary to confine the operativeparts in :i

housing to prevent the escape of dust to the injury of an operator andthis invention is along these lines but it simplies the handling of thearticles being treated by the sand blast in permitting all of the eX-posed faces of the said articles to be subjected to the sand blast whichobviates the necessity of rehandling said articles` as the turn-tablewhich supports such articles during their treatment passes from theinterior of the chamber.

Referring to the drawings forming part of this application, there isshown a base 10 upon which a standard 11 is mounted and this standard isprovided with bearings 12 and 13. A vertical shaft 14 passes through thebearing 13 and has its lower end mounted 1n a bearing l5 upon a step 16.A turntable 17 is mounted upon the upper end of the shaft 14; and theface of this turn-table is slotted to permit sand being blown againstarticles on the table to pass through said slots to a compartment in.which said sand and dust are collected. The shaft 14 is further providedwith a beveled gear 19 which meshes with a pinion 20 carried by theshaft 2l which passes through the bearing 12 and a bear .ig 22 instandard 23 which is also supported by the base 10. The shaft 21supports a beveled gear 24 which meshes with a corresponding gear 25carried by the shaft 26 which passes through the bearings 2T and ofwhich the hearing 27 is an integral part of the standard 23 and thebearing 28 is part ot' the standard 29. A gear 30 is mounted upon the uper end of the shaft 26 and .this gear mes ies with the cors respondinggear 31 mounted upon one end of the shaft 32 which is journaled in thebe: ring 33 formed yon the standard 29. Pulleys 34 are mounted upon theAshaft 32 i1 the usual manner of which oneof said pulleys may be looselymounted upon said .shaft and the other fixed thereto. The shaft is alsojournaled in a bearing` 35 in a standard 36 which ltogether with thestandard 29 is mounted upon a housing 87 which may be of semicirculardesign to partly sur- 17 'is rotated through the gearing and shaft-` ingshown and any articles placed on said table for treatment are carriedpast the curtain 38 .into the chamber formed by the housing 37 wherethey are subjected to the treatment of a sand blast, which in thisapplication is directed against all of, the exposed sides of the articleas will be apparent from the following. The standard 36 has a fitting 39formed thereon in two sections as shown which are adapted to clamp andsupport an air supply pipe 40 which passes vertically therethrough. Thispipe Supports a bearing block 41 on the lower end thereof, and saidbearing block rotatably supports a shell 42 into the lower end of whicha plug 43 is screwed The plug 43 supports a depending tube 44 anda locknut 45 which vbinds against the lower end of the shell 42.

The tube 44 passes downwardly from the top of the housing 37 and isprovided with a T 46 from which extend branch pipes 47 to support sandhoppcrs and spray heads at the ends thereof. As the hopper and sprayhead are formedin the same casting, they may be termed the spray headand as shown in Fig. 5, the hopper to receive sand is shown at 48. Thelower end of said sand Y' hopper terminates in the lower chamber 49 intolwhich the nozzle 50 is inserted and held as by a nut 51, and throughthis nozzle sand is forced by` an air spray from a jet 52. The jet 52 iscarried by la nipple 53 having a passage 54 which communicates with theend of the branch 47 as at 55. The spray' head may be formed ofcomplemental halves as shown at 56 and 57 having bolts 58 as fasteningmeans for said sections, this construction providing easy access to allparts in the interior thereof. lt is apparent that air under pressurefed to the pipe 40 is distributed through the branches 47., passages and54 through the jet 52 where it collects particles of sand and forces thesame through nozzle 50 to form a blast and through the rotation of thepipe 44, all parts f of. articles placed upon the table 17 are acted.upon by the sand blast.

The shell 42 is provided with a gear 59 which meshes with a pinion 60carried by the end of the shaft 32 and through rotation of the shaft 32the'table 17 as well as the vsand blasts are rotated.

The sand is fed into the hopper 48 from a chute 61 which is provided atits lower end with a valve mechanism comprising dampers 62 which aremounted upon the shafts 63 having cranks 64 formed thereon t0 which endsof a link 65 are connected to cause said dampers to move in unison. Oneof said levers is connected as by a link 66 to a trip 67 which isadapted to engage the forward edge'of the hopper 48.

The chute 61 is supplied from the housing 62 formedonth@ housing 63.which i11- lcharge a quantity of'saiid from said chutes through achamber 70, chute 71 from lthe 70 separator housing 72 in which bailleplates?"A 73 are mounted. Buckets 74 on a belt 7 5 passing over pulleys76 and 77 in the chamber 78, raise sand for delivery over the bailleplates 73, from the chamber 79 which' 75 is at thev bottom of theinclined bottom 80.5

A screen 81 is placed in the lower compart! ment of the housing 37. Dustmay be removed from the several compartments as by suction through theexhaust pipes 82 80 and 83.

To facilitate in exposing all 'the sides of an article placed upon theturn-table 17 to the action of the sand blast,the axis of the revolvingspray heads is eccentric to that 35 of the turntable as clearly shown inFig. 2

of the drawing.V

Fig. 8 shows a modification ofthe sand blast in which the branch pipe 47and air nozzle'remain the same as in the former de- 99' scription, butsuperposedabo've the hopper- 48V is a supplemental hopper. 84 having they desired capacity and having ears 85 extending`therefrom which receivepins 86. .These pins are provided at their upper ends 'with 95 heads 87which limit the upward movement ofthe ears 85 and said pins are furtherprovided with adjusting huts 88 and lock nuts 89 to regulate compressionof the coil springs 90. The lower ends of the pins 86 190 pass throughthe extensions 91 and are held in fixed relation therein as by nuts 93.In this construction rotation of tl. sand blasts will cause the hoppers84 to pess'un-y der the chute 61 in the usual order andL when the hopper84 is approximately emptied, the springs 90 raise said hopper to causethe' edge thereof to engage the trip. 67 but if a quantity of sandremains in the hopper, its

and

weight causes the springs 90 to yield to 110 cause the upper edge of thehopper to pass below thetrip 67.

The operation of this device has been-de scribed in the foregoingdescription of the several parts and it is thought that furtherdescription is unnecessary.

Various modifications may be made with"-v in the scope of this inventionwithout departing from the'spirit thereof and the drawings are submittedfor illustrativepur--1 a pose only.

Having thus described my invention, I"

claim 1. A sand blast of the `class described,

chute disposed over the path 'of said spray heads in the rotationthereof, a delivery valve in said chute, and a valve operating tripactuated by saidmspray .heads to disy comprising 'revolving spray heads,.a sand 125 to said sand blasts in the rotation yof said spray heads.

, 2. A sand blast of theclass described, comprising a revolving fittinghaving a continuous' air supply thereto, sand blasts carried by saidfitting, hoppers carried by said spray heads, a chute disposed over thepath of said hoppers, atrip carried by said-.chute and aetuated by saidhoppers for delivering a quantity o f sand into said hoppers, saidhoppers havlng vertical movement with respect to said trip dependent-upon-the quantity of sand contained therein, per engaging said tripwhen in raised position to refill said hopper. 1

3. A sand blast of the class described, comprising a rotatable sandblast, said sand blast comprising a hopper to receive a quantity of sandtherein, a chute for. delivering said sand to said hopper as-said hopperpasses thereunderand a valve mechanism chute actuated by -saidhopcarried by said 'shedlto envelep said' and said hopper when saidhopper is positioned properly under said chute.

4. Ina sand blast of the class described, a housing, a supply pipe fordelivering a Huid pressure to the interior of said housing, a standardcarried by lsaid housing supporting said supply pipe, a head carried bythe end of saidsupply pipe," a shell rotatably carried by said head, aplug carried by said head vwith said shell an extension from said snpplyand plug,

carried by said shell and pipe rotatably v plug with respect tov saidhead, a carriedl by said rotatable extension land means forrotai-ingsaid shell. about said head.

In testimony whereof I afiiX my signature in presence of two witnesses.

CLARENCE E. BILLNGS.

Witnesses:

Grenen L. THOM, Huso Moen.

spray head

